In Michigan's upper peninsula lies one of the world's oldest and largest lava flows. It's housed in a historic park, and it ...

Left: A close-up of a crack in the volcanic surface of a cooled lava flow from the crater of Mt. St. Helens.

Most active volcanoes have craters filled with rocks and cooled lava, like Mount St. Helens, or with water, like Crater Lake in Oregon. The third problem is that dumping trash into those eight ...

As it pours down the volcano, the lava at the surface is cooled by the air and solidifies, creating an elastic, skinlike outer layer. Beneath this inflating membrane, the lava continues to ooze ...

Intrusive indicates that the magma was forced close to the surface, but then cooled more slowly underneath the surface. When lava erupts from a volcano, it can be as much as 10 times hotter than ...

Tastes changed and the lava lamp craze cooled by the late 1970s. In 1989, when Granger met the then-septuagenarian Craven Walker at a nudist camp (both were clothed, at her request) to discuss her ...